@article{SF_1976__12_134179,
     author = {J. D. Lawson},
     title = {Additional notes on continuity in semitopological semigroups.},
     journal = {Semigroup forum},
     pages = {265--280},
     year = {1976},
     volume = {12},
     zbl = {0327.22003},
     url = {http://geodesic.mathdoc.fr/item/SF_1976__12_134179/}
}